70
71
72
73
74
75
±
40
±
7
26
59
92
125
S
ig
n
a
l-
to
-N
o
is
e
+
D
is
to
rt
io
n
R
a
ti
o
(
d
B
)
Free-Air Temperature (
o
C)
C054
---- ± 2.5*V
REF,
----
1.25*V
REF,
----
0.625*V
REF,
------
0.3125*V
REF,
-------
0.156 V
REF,
---- + 2.5*V
REF
---- + 1.25*V
REF,
---- + 0.625*V
REF,
---- + 0.3125*V
REF
±
120
±
115
±
110
±
105
±
100
±
95
±
90
±
85
±
80
100
1000
10000
T
o
ta
l
H
a
rm
o
n
ic
D
is
to
rt
io
n
(
d
B
)
Input Frequency (Hz)
C056
---- ± 2.5*V
REF,
----
1.25*V
REF,
----
0.625*V
REF,
------
0.3125*V
REF,
-------
0.156 V
REF,
---- + 2.5*V
REF
---- + 1.25*V
REF,
---- + 0.625*V
REF,
---- + 0.3125*V
REF
70
71
72
73
74
75
±
40
±
7
26
59
92
125
S
ig
n
a
l-
to
-N
o
is
e
R
a
ti
o
(
d
B
)
Free-Air Temperature (
o
C)
C053
---- ± 2.5*V
REF,
----
1.25*V
REF,
----
0.625*V
REF,
------
0.3125*V
REF,
-------
0.156 V
REF,
---- + 2.5*V
REF
---- + 1.25*V
REF,
---- + 0.625*V
REF,
---- + 0.3125*V
REF
70
71
72
73
74
75
100
1000
10000
S
ig
n
a
l-
to
-N
o
is
e
+
D
is
to
rt
io
n
R
a
ti
o
(
d
B
)
Input Frequency (Hz)
C055
---- ± 2.5*V
REF,
----
1.25*V
REF,
----
0.625*V
REF,
------
0.3125*V
REF,
-------
0.156 V
REF,
---- + 2.5*V
REF
---- + 1.25*V
REF,
---- + 0.625*V
REF,
---- + 0.3125*V
REF
±
160
±
120
±
80
±
40
0
0
50000
100000
150000
200000
250000
A
m
p
lit
u
d
e
(
d
B
)
Input Frequency (Hz)
C051
70
71
72
73
74
75
100
1000
10000
S
ig
n
a
l-
to
-N
o
is
e
R
a
ti
o
(
d
B
)
Input Frequency (Hz)
C052
---- ± 2.5*V
REF,
----
1.25*V
REF,
----
0.625*V
REF,
------
0.3125*V
REF,
-------
0.156 V
REF,
---- + 2.5*V
REF
---- + 1.25*V
REF,
---- + 0.625*V
REF,
---- + 0.3125*V
REF
SBAS492 – JULY 2015
Typical Characteristics (continued)
At T
A
= 25°C, AVDD = 5 V, DVDD = 3 V, internal reference V
REF
= 4.096 V, and f
SAMPLE
= 500 kSPS, unless otherwise noted.
Number of points = 4k, f
IN
= 1 kHz, SNR = 72.57 dB,
SINAD = 72.56 dB, THD = –91.022 dB, SFDR = 94 dB
Figure 50. Typical FFT Plot (0.3125 × V
REF
)
Figure 51. SNR vs Input Frequency
f
IN
= 1 kHz
Figure 52. SNR vs Temperature
Figure 53. SINAD vs Input Frequency
f
IN
= 1 kHz
Figure 54. SINAD vs Temperature
Figure 55. THD vs Input Frequency
Copyright © 2015, Texas Instruments Incorporated
19
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